What is a forward error correction?

Error correction is a data transmission method that allows receivers to automatically detect and fix many types of errors in information. The process does not require communication with the transmitter. Instead, the receiver independently manages errors if possible. In situations where data is hopelessly damaged, it may be necessary to request a repeated transmission to obtain a clean copy. The nature of redundant data may vary depending on the access used to add data; Some options include algebraic coding, Viterbi decodering algorithm and convolutional coding. They create a pattern that the receiver can recognize and use to check the rest of the data. In the event of a problem, the receiver uses to compile error correction forwards known redundant data against apparently damaged information and use this analysis to correct damaged data and generate the output for the user. If the receiver cannot fix the error, this may indicate that data is too corrupt or could include empty spaces whereIt was not possible to restore information.

One of the advantages of transmitting errors is that the transmitter can send data explosion to as many receivers as possible, all at once. The receivers do not need a Handshake with a transmitter and are not tied to its transmissions. It can also reduce the system load, as data sending requirements can quickly eat the bandwidth and can delay more transmissions. However, adding redundant information to transmission can also clog the bandwidth. The designers must consider this to develop a technique of correction forward because you want to send enough additional data for the receiver for use, without overloading the system.

The basic framework for proof of error correction has existed since the beginning of the 20th century with transmission above the radio. The considerable research of this topic was carried out in the 40s and 50s of the 20th century. Companies continue to develop new ways of efficient transmission of accurate data with the lowest possible width loadzones. The zone width requirements increase in many regions, which means that it can be an important point of view in transmission algorithms.